Since my room can be turned into total darkness by a single power switch within my reach at my bench table while I'm working, I use this below method.
I like the idea of automation using script + ImageMagick, thanks.
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif)
The setup, once the camera's settings like position, zoom, exposure and etc are set perfectly, all I need is just to turn off the light with the remote at the other hand, and then push the camera IR remote to initiate the shot while in total darkness
![Tongue :P](https://www.eevblog.com/forum/Smileys/default/tongue.gif)
, and turn the light back. Btw, that remote is cheap Chinese clone that cost me just $2.
![Evil >:D](https://www.eevblog.com/forum/Smileys/default/evil.gif)
![](https://www.eevblog.com/forum/beginners/oscilloscope-training-class-(long)/?action=dlattach;attach=22215;image)
The result example, cropped, resized and mildly processed to increase the contrast level.
![](https://www.eevblog.com/forum/beginners/oscilloscope-training-class-(long)/?action=dlattach;attach=22223;image)
These photos are originated from my previous post ->
HERE